【作者】 陈晓羲； 刘斌； 陈晴； 柳雅馨； 段旭昌；

【Author】 Chen Xiaoxi;Liu Bin;Chen Qing;Liu Yaxin;Duan Xuchang;College of Food Science and Engineering,Northwest A&F University;Laboratory of Quality and Safety Risk Assessment for Agro-products,Ministry of Agriculture;National Engineering Research Center of Agriculture Integration Test;Fuping Modern Agriculture Comprehensive Demonstration Station,Northwest A&F University;

【机构】 西北农林科技大学食品科学与工程学院； 农业部农产品质量安全风险评价实验室； 中国农业综合试验国家工程研究中心； 西北农林科技大学富平现代农业综合试验示范站；

【摘要】 中国具有较大的柿饼消费市场,而柿饼霉变和二氧化硫残成为危害消费者健康的潜在风险。目前,臭氧和紫外杀菌成为了降低风险的有效手段,然而由于作用条件缺乏优化,杀菌效果较差。本文对人工干制柿饼各干燥阶段存在的细菌和真菌进行鉴定,并根据优势菌株的杀菌率优化臭氧和紫外作用条件。结果表明,短小杆菌、藤黄色杆菌、红酵母、青霉、曲霉是人工干制过程中主要污染菌,干燥36 h和48 h是控制微生物污染的关键点。此外,与臭氧或紫外杀菌的结果相比,联合处理杀菌效率远高于单因素处理。最后,对柿饼的颜色指数、水分含量、水分活度、水溶性单宁含量、原果胶含量、乙醛含量进行分析,结果表明臭氧和紫外对柿饼的品质无影响。综上所述,臭氧和紫外杀菌可用于提高人工干制过程中柿饼的产量。更多还原

【Abstract】 China has a large market for dried persimmon fruits,but mold and sulfur dioxide（SO₂） residue have become serious potential consumer health risks.To reduce these risks,the ozone and/or UV-C sterilization methods were applied.However,these methods had low effectiveness due to lack of sterilization condition optimization.In this study,bacteria and fungi strains were identified and optimal ozone and/or UV-C conditions were selected by treating predominant strains.Results showed that Curtobacterium,Luteibacter,Rhodotorula,Penicillium,and Aspergillus were the predominant microorganisms in the whole artificial drying process,and drying for 36 h and 48 h were found to effectively influence the quantity of microorganism contamination.Comparing the mortalities of microorganism revealed that the sterilization of combining ozone with UV-C was superior to the individual utilization of ozone or UV-C.Finally,the physic-chemical changes,including color,moisture content,water activity,water-soluble tannin,protopectin,and acetaldehyde,were evaluated,and the results suggested non-thermal sterilization had no obvious effects on these properties.Therefore,these optimal conditions could potentially enhance the production of dried persimmon fruits.更多还原